US20230364119A1 - Autophagy activator - Google Patents

Autophagy activator Download PDF

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US20230364119A1
US20230364119A1 US18/026,009 US202118026009A US2023364119A1 US 20230364119 A1 US20230364119 A1 US 20230364119A1 US 202118026009 A US202118026009 A US 202118026009A US 2023364119 A1 US2023364119 A1 US 2023364119A1
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inositol
autophagy
gene
derivative
salts
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Yuko NAKAGAMI
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Resonac Corp
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Resonac Corp
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/70—Carbohydrates; Sugars; Derivatives thereof
    • A61K31/7028—Compounds having saccharide radicals attached to non-saccharide compounds by glycosidic linkages
    • A61K31/7034—Compounds having saccharide radicals attached to non-saccharide compounds by glycosidic linkages attached to a carbocyclic compound, e.g. phloridzin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/045—Hydroxy compounds, e.g. alcohols; Salts thereof, e.g. alcoholates
    • A61K31/047—Hydroxy compounds, e.g. alcohols; Salts thereof, e.g. alcoholates having two or more hydroxy groups, e.g. sorbitol
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
    • A61K31/35—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom
    • A61K31/352—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom condensed with carbocyclic rings, e.g. methantheline 
    • A61K31/353—3,4-Dihydrobenzopyrans, e.g. chroman, catechin
    • A61K31/355—Tocopherols, e.g. vitamin E
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
    • A61K31/365—Lactones
    • A61K31/375—Ascorbic acid, i.e. vitamin C; Salts thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/66—Phosphorus compounds
    • A61K31/665—Phosphorus compounds having oxygen as a ring hetero atom, e.g. fosfomycin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/70—Carbohydrates; Sugars; Derivatives thereof
    • A61K31/7042—Compounds having saccharide radicals and heterocyclic rings
    • A61K31/7048—Compounds having saccharide radicals and heterocyclic rings having oxygen as a ring hetero atom, e.g. leucoglucosan, hesperidin, erythromycin, nystatin, digitoxin or digoxin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00

Definitions

  • the present invention relates to an autophagy activator and a composition for activating autophagy.
  • Autophagy is a mechanism for regeneration of energy and removal of damaged substances by responding to extracellular or intracellular stresses and signals, such as starvation, growth factor deprivation, and pathogen infection, and by degrading aged or damaged intracellular substances and organelles, and is important for maintaining normal cellular homeostasis.
  • Previous studies have reported that autophagy activity in cells decreases sharply as aging proceeds (Non Patent Document 1).
  • Non Patent Document 1 when autophagy is suppressed, aging mitochondria and misfolded proteins accumulate excessively in cells, and oxidative stress increases in cells, which induces cell death, and as a result, cellular senescence occurs.
  • Non Patent Documents 2 and 3 Especially in Alzheimer's disease, since the function of autophagy is inhibited, aggregated protein called amyloid ⁇ accumulates in the living body, and this is said to be involved in the development of the disease (Non Patent Document 4).
  • the autophagy process has been studied in both yeast and mammals and utilizes up to 36 proteins.
  • the process from autophagosome formation to differentiation of the contents thereof is controlled by the Atg protein encoded by the autophagy-related gene (ATG), classification into six groups including the Atg12-Atg5 binding system and the LC3-phosphatidyl ethanolamine (PE) binding system can be performed, and each works step by step in each process.
  • ATG autophagy-related gene
  • PE LC3-phosphatidyl ethanolamine
  • mTOR mammalian target of rapamycin
  • an object of the present invention is to provide an autophagy activator and a composition for activating autophagy containing the autophagy activator capable of effectively activating autophagy.
  • the present invention includes the following aspects.
  • An autophagy activator comprising, as an active ingredient, an inositol derivative in which a saccharide is bound to inositol.
  • a composition for activating autophagy comprising the autophagy activator according to any one of [1] to [8] and a pharmaceutically acceptable carrier.
  • composition for activating autophagy according to [9] in which the total content of the inositol derivative is 0.1 to 2% by mass.
  • composition for activating autophagy according to [9] or [10], further comprising at least one vitamin derivative or a salt thereof selected from a group consisting of vitamin C derivatives, vitamin E derivatives, and vitamin P derivatives.
  • composition for activating autophagy in which the vitamin derivative or a salt thereof is at least one vitamin derivative or a salt thereof selected from a group consisting of ascorbyl phosphate or a salt thereof, fatty acid esters of ascorbyl phosphate or a salt thereof, tocopherol phosphate or a salt thereof, and methyl hesperidin or a salt thereof.
  • composition for activating autophagy according to [11] or [12], in which a total content of the vitamin derivative or a salt thereof is 0.01 to 15% by mass relative to a total amount of the composition for activating autophagy.
  • an autophagy activator and a composition for activating autophagy comprising the autophagy activator capable of effectively activating autophagy are provided.
  • An autophagy activator of the present embodiment contains, as an active ingredient, an inositol derivative in which a saccharide is bound to inositol.
  • autophagy is a mechanism that regenerates energy and removes damaged substances by degrading aged or damaged intracellular substances and organelles.
  • the autophagy activator of the present embodiment can promote the expression of the LC3 gene, which is an autophagy marker, and the ATG5 and Beclin 1 genes contained in autophagosomes, and can activate autophagy.
  • autophagy can be activated by suppressing the expression of the mTOR gene, which acts as a suppressor of autophagy.
  • the inositol derivative in the autophagy activator of the present embodiment is a compound composed of inositol and saccharide, and specifically, a compound in which a saccharide is bound to at least one hydroxyl group of inositol.
  • Inositol constituting an inositol derivative is a cyclic hexahydric alcohol represented by C 6 H 6 (OH) 6 .
  • Inositol includes nine types of stereoisomers such as cis-inositol, epi-inositol, allo-inositol, myo-inositol, muco-inositol, neo-inositol, chiro-inositol (there are D- and L-forms), and scyllo-inositol.
  • Inositol constituting the inositol derivative is preferably myo-inositol, which has physiological activity, among the above stereoisomers.
  • the structural formula of myo-inositol is shown below.
  • Examples of methods for producing inositol include a method of extracting from rice bran, a chemical synthesis method, and a fermentation method.
  • a saccharide constituting an inositol derivative may be a monosaccharide or an oligosaccharide.
  • monosaccharide means a saccharide that cannot be further hydrolyzed, and means a compound that becomes a component when forming a polysaccharide.
  • a monosaccharide can also be said to be the smallest unit of saccharides.
  • Oligosaccharides are saccharide oligomers in which multiple monosaccharides are bonded by glycosidic bonds.
  • monosaccharides include glucose (grape sugar), fructose (fruit sugar), galactose, ribose, xylose, mannitol, sorbitol, xylitol, erythritol, and pentaerythritol.
  • oligosaccharides include disaccharides such as sucrose (cane sugar), lactose (milk sugar), maltose (malt sugar), isomaltose, trehalose, cellobiose, and maltitol; trisaccharides such as raffinose, melezitose, and maltotriose; tetrasaccharides such as stachyose; hexasaccharides such as ⁇ -cyclodextrin; heptasaccharides such as ⁇ -cyclodextrin; and octasaccharides such as ⁇ -cyclodextrin.
  • disaccharides such as sucrose (cane sugar), lactose (milk sugar), maltose (malt sugar), isomaltose, trehalose, cellobiose, and maltitol
  • trisaccharides such as raffinose, melezitose, and maltotriose
  • glucose or an oligosaccharide containing glucose as a monosaccharide unit is preferable.
  • a monosaccharide unit means a chemical structure corresponding to a monosaccharide, and can also be said to be a chemical structure derived from a monosaccharide.
  • the oligosaccharide containing glucose as a monosaccharide unit may be an oligosaccharide in which only glucose is in multiple bonds by glycosidic bonds, or an oligosaccharide in which at least one molecule of glucose and a saccharide other than glucose are in multiple bonds by glycosidic bonds.
  • the molecular weight of the oligosaccharide containing glucose as a monosaccharide unit may be, for example, approximately 300 to 3000.
  • the saccharide may be bound to any one of the six hydroxyl groups present in the inositol molecule, or may be bound to any two or more of them.
  • one molecule of inositol may be bound to one or more monosaccharides
  • one molecule of inositol may be bound to one or more oligosaccharides
  • one molecule of inositol may be bound to one or more monosaccharides and one or more oligosaccharides.
  • the total number of saccharides (monosaccharides and/or oligosaccharides) bound to one molecule of inositol is 1 or more, may be, for example, 2 or more, may be, for example, 3 or more, may be, for example, 4 or more, and may be, for example, 10 or more in terms of monosaccharide units.
  • conversion to monosaccharide units indicates how many monosaccharide units constitute a saccharide bound to one molecule of inositol.
  • a case where a plurality of saccharides are bound to one molecule of inositol means the sum of the number of monosaccharide units of the plurality of saccharides.
  • a disaccharide is converted into 2 monosaccharide units, and a trisaccharide is converted into 3 monosaccharide units.
  • the number of monosaccharide units is 5 upon conversion.
  • monosaccharides such as glucose (grape sugar), fructose (fruit sugar), galactose, ribose, xylose, mannitol, sorbitol, xylitol, erythritol, and pentaerythritol are converted into a monosaccharide unit.
  • Disaccharides such as sucrose (cane sugar), lactose (milk sugar), maltose (malt sugar), isomaltose, trehalose, cellobiose, and maltitol are 2 when converted into a monosaccharide unit.
  • trisaccharides such as raffinose, melezitose, and maltotriose are 3 when converted into a monosaccharide unit.
  • tetrasaccharides such as stachyose are converted into 4 monosaccharide units
  • hexasaccharides such as ⁇ -cyclodextrin are converted into 6 monosaccharide units
  • heptasaccharides such as ⁇ -cyclodextrin are converted into 7 monosaccharide units
  • octasaccharides such as ⁇ -cyclodextrin are converted into 8 monosaccharide units.
  • the inositol derivative in the present embodiment preferably uses ⁇ -cyclodextrin as a raw material saccharide from the viewpoint of easily obtaining a highly purified inositol derivative.
  • ⁇ -cyclodextrin is industrially inexpensive and can be reliably supplied.
  • the saccharide constituting the inositol derivative contains glucose as a constituent unit.
  • Inositol derivatives in the present embodiment may be in the form of pharmaceutically acceptable salts.
  • pharmaceutically acceptable salt means a salt form that does not inhibit the physiological activity of the inositol derivative.
  • the pharmaceutically acceptable salts of inositol derivatives are not particularly limited, and examples thereof include salts with alkali metals (sodium, potassium, and the like); salts with alkaline earth metals (magnesium, calcium, and the like); organic bases (pyridine, triethylamine, and the like), and salts with amines.
  • Inositol derivatives may also be in the form of solvates.
  • the inositol derivative may be in the form of a solvate of a salt of the inositol derivative.
  • Solvates are not particularly limited, and examples thereof include hydrates and ethanol solvates.
  • the inositol derivatives may be used alone or in combination of two or more.
  • the inositol derivative in the autophagy activator of the present embodiment is preferably a mixture of two or more inositol derivatives, more preferably a mixture of 2 to 40 inositol derivatives, still more preferably a mixture of 2 to 30 inositol derivatives, and particularly preferably a mixture of 10 to 30 inositol derivatives.
  • the inositol derivative in the autophagy activator of the present embodiment preferably contains an inositol derivative in which the total number of saccharides bound to one molecule of inositol is 10 or more in terms of monosaccharide units.
  • the inositol derivative in the autophagy activator of the present embodiment is preferably an inositol derivative in which glucose or an oligosaccharide containing glucose as a monosaccharide unit is bound to inositol, and a mixture of two or more of the inositol derivatives is preferable.
  • a mixture of 2 to 40 types of inositol derivatives is more preferable, a mixture of 2 to 30 types of inositol derivatives is still more preferable, and a mixture of 10 to 30 types of inositol derivatives is particularly preferable.
  • the inositol derivative in the autophagy activator of the present embodiment contains an inositol derivative in which glucose or an oligosaccharide containing glucose as a monosaccharide unit is bound to inositol, and contains an inositol derivative in which the total of number of glucose molecules bound to one molecule of inositol and oligosaccharides containing glucose as a monosaccharide unit is 10 or more in terms of monosaccharide units.
  • the method for producing the inositol derivative is not particularly limited, and the inositol derivative can be appropriately produced by a conventionally known method.
  • inositol and cyclodextrin which is one type of oligosaccharides, may be reacted in the presence of cyclodextrin glucanotransferase to synthesize an inositol derivative (for example, refer to Japanese Unexamined Patent Publication No. 63-196596).
  • an inositol derivative may be synthesized by a method of obtaining a glucosyl using a glucosyl phosphite as a sugar donor (for example, refer to Japanese Unexamined Patent Publication No. 6-298783).
  • the autophagy activator of the present embodiment can be used by being administered to a patient for the purpose of treating neurodegenerative diseases such as Alzheimer's disease, Huntington's disease, and Parkinson's disease.
  • the autophagy activator of the present embodiment can also be used by blending the autophagy activator into pharmaceuticals and cosmetics for the purpose of activating autophagy.
  • the autophagy activator may be used by blending the autophagy activator into the composition for activating autophagy described below.
  • the autophagy activator of the present embodiment can effectively activate autophagy by promoting LC3 gene expression.
  • the autophagy activator of the present embodiment can effectively activate autophagy by promoting ATG5 gene expression.
  • the autophagy activator of the present embodiment can effectively activate autophagy by promoting Beclin 1 gene expression.
  • the autophagy activator of the present embodiment can effectively activate autophagy by suppressing mTOR gene expression.
  • the autophagy activator of the present embodiment can effectively activate autophagy
  • the autophagy activator can be used for prevention or treatment of Alzheimer's disease.
  • Amyloid ⁇ is known to cause a decrease in autophagy in nerve cells.
  • amyloid ⁇ is known to induce a decrease in autophagy and thereby cell death called apoptosis of nerve cells.
  • the autophagy activator of the present embodiment can promote LC3 gene expression in the presence of amyloid ⁇ .
  • the autophagy activator of the present embodiment can promote ATG5 gene expression in the presence of amyloid ⁇ .
  • the autophagy activator of the present embodiment can promote Beclin 1 gene expression in the presence of amyloid ⁇ .
  • the autophagy activator of the present embodiment can suppress apoptosis in the presence of amyloid ⁇ .
  • the autophagy activator of the present embodiment promotes expression of at least one gene selected from the group consisting of the LC3 gene, ATG5 gene, and Beclin 1 gene in the presence of amyloid particularly in nerve cells.
  • the autophagy activator of the present embodiment can suppress apoptosis in the presence of amyloid ⁇ , particularly in nerve cells.
  • Promoting LC3 gene expression in the presence of amyloid means that administration of the autophagy activator of the present embodiment in the presence of amyloid ⁇ results in an increase in expression level of LC3 genes compared to the case where the autophagy activator is not administered.
  • the same is also applied for the ATG5 gene and the Beclin 1 gene.
  • Suppressing apoptosis in the presence of amyloid means that administration of the autophagy activator of the present embodiment in the presence of amyloid ⁇ results in suppressing apoptosis in expression compared to the case where the autophagy activator is not administered.
  • LC3 microtubule associated protein 1 light chain 3 alpha: NCBI Gene ID: 84557 to which phosphatidylethanolamine has been added upstream of autophagy signal transduction is converted into LC3-II that is attracted to the autophagosome membrane, and binds to the autophagosome membrane.
  • LC3 is used as a marker for autophagosomes. Examples of nucleotide sequences of the human LC3 gene include NM_032514.4 and NM_181509.3 registered in the NCBI Reference Sequence database.
  • ATG5 (autophagy related 5: NCBI Gene ID: 9474) binds to ATG12 and functions as an E1-like activating enzyme in a ubiquitin-like conjugation system.
  • Examples of nucleotide sequences of the human ATG5 gene include NM_001286106.1, NM_001286107.1, NM_001286108.1, NM_001286111.1, and NM_004849.4 registered in the NCBI Reference Sequence database.
  • Beclin 1 (NCBI Gene ID: 8678) forms the Class 111 PI3K complex with ATG14L and Vps34mp150, and functions as a positive regulator of autophagosome formation.
  • nucleotide sequences of the human Beclin 1 gene include NM_001313998.2, NM_001313999.1, NM_001314000.1, and NM_003766.4 registered in the NCBI Reference Sequence database.
  • mTOR (mechanistic target of rapamycin kinase: NCBI Gene ID: 2475) is one type of phosphatidylinositol kinase-related kinase, and mediates cellular responses to stresses such as DNA damage and nutrient deprivation. mTOR functions as a suppressor of autophagy. Examples of nucleotide sequences of the human mTOR gene include NM_004958.4 and the like registered in the NCBI Reference Sequence database.
  • the autophagy activator of the present embodiment may be used by being administered to patients at high risk of developing neurodegenerative diseases such as Alzheimer's disease, Huntington's disease, and Parkinson's disease and prevent neurodegenerative diseases such as Alzheimer's disease, Huntington's disease, and Parkinson's disease.
  • the autophagy activator of the present embodiment may be used by being administered to patients who have developed neurodegenerative diseases such as Alzheimer's disease, Huntington's disease, or Parkinson's disease, and suppress the progression or aggravation of the neurodegenerative disease.
  • the autophagy activator of the present embodiment can be administered to patients in the same manner as the composition for activating autophagy described below, may be administered orally, may be administered parenterally, may be administered intravenously, intraarterially, intramuscularly, intradermally, subcutaneously, intraperitoneally, or the like, may be administered intrarectally as a suppository; or may be administered to the skin as an external skin preparation.
  • composition for activating autophagy of the present embodiment contains an autophagy activator containing the above-described inositol derivative in which a saccharide is bound to inositol, and a pharmaceutically acceptable carrier.
  • composition for activating autophagy of the present embodiment can be produced according to a conventional method (for example, the method described in the Japanese Pharmacopoeia) by mixing and formulating the above-described autophagy activator, a pharmaceutically acceptable carrier, and optionally other ingredients.
  • the term “pharmaceutically acceptable carrier” means a carrier that does not inhibit the physiological activity of the active ingredient and does not exhibit substantial toxicity to the administration target.
  • not exhibit substantial toxicity means that the ingredient does not show toxicity to the administration target at the administration dosage normally used.
  • Pharmaceutically acceptable carriers are not particularly limited, and examples thereof include excipients, binders, disintegrating agents, lubricants, stabilizers, diluents, solvents for injection, moisturizers, texture improvers, surfactants, polymerizing/thickening/gelling agents, solvents, propellants, antioxidants, reducing agents, oxidizing agents, chelating agents, acids, alkalis, powders, inorganic salts, water, metal-containing compounds, unsaturated monomers, polyhydric alcohols, polymer additives, wetting agents, thickeners, tackifiers, oily raw materials, liquid matrices, fat-soluble substances, and polymer carboxylates.
  • ingredients include those described in International Publication No. 2016/076310.
  • specific examples of the polymerizing/thickening/gelling agent include methacryloyloxyethyl phosphorylcholine, butyl methacrylate, and polymers thereof.
  • the pharmaceutically acceptable carriers in the composition for activating autophagy of the present embodiment may be used alone or in combination of two or more.
  • ingredients are not particularly limited, and examples thereof include preservatives, antibacterial agents, ultraviolet absorbers, whitening agents, vitamins and the derivatives thereof, antiphlogistic agents, anti-inflammatory agents, hair growth agents, blood circulation promoters, stimulants, hormones, anti-wrinkle agents, anti-aging agents, tightening agents, cooling agents, warming agents, wound healing accelerators, irritation mitigation agents, analgesics, cell activators, plant/animal/microorganism extracts, seed oil, antipruritic agents, exfoliating/dissolving agents, antiperspirants, algefacients, astringents, enzymes, nucleic acids, fragrances, pigments, coloring agents, dyes, pigments, anti-inflammatory analgesics, antifungal agents, antihistamines, hypnotic sedatives, tranquilizers, antihypertensive agents, antihypertensive diuretics, antibiotics, anesthetics, antibacterial substances, antiepileptic agents, coronary vas
  • Specific examples of these ingredients include those described in International Publication No. 2016/076310.
  • specific examples of plant/animal/microorganism extracts include Lapsana communis flower/leaf/stem, and tea leaves.
  • Specific examples of seed oils include moringa seed oil.
  • Specific examples of fragrances include perillaldehyde.
  • the other ingredients may be used alone, or in combination of two or more.
  • composition for activating autophagy of the present embodiment can contain a therapeutically effective amount of the autophagy activator.
  • “Therapeutically effective amount” means an amount of drug effective to treat or prevent disease in a patient. The therapeutically effective amount may vary depending on the disease state, age, sex, body weight, and the like of the administration target.
  • therapeutically effective amount of the autophagy activator may be an amount capable of activating autophagy by an inositol derivative in which a saccharide is bound to inositol.
  • therapeutically effective amount of the autophagy activator may be an amount that allows the inositol derivative in which a saccharide is bound to inositol to promote the expression of at least one gene selected from the group consisting of the LC3 gene, ATG5 gene, and Beclin 1 gene.
  • the therapeutically effective amount of the autophagy activator may be an amount that allows the inositol derivative in which a saccharide is bound to inositol to suppress mTOR gene expression.
  • the therapeutically effective amount of the autophagy activator may be an amount that allows the inositol derivative in which a saccharide is bound to inositol to suppress apoptosis in the presence of amyloid (3.
  • the therapeutically effective amount (total content of inositol derivatives in which a saccharide is bound to inositol) of the autophagy activator in the composition for activating autophagy of the present embodiment may be, for example, 0.1 to 2% by mass, may be, for example, 0.15 to 1.5% by mass, and may be, for example, 0.2 to 1% by mass relative to the total amount of the composition for activating autophagy.
  • the total content of inositol derivatives in which a saccharide is bound to inositol means the content of the compound when one type of inositol derivative in which a saccharide is bound to inositol is used alone, and means the total content of the compounds when two or more types of inositol derivatives in which a saccharide is bound to inositol are used in combination.
  • composition for activating autophagy of the present embodiment may contain other autophagy activating components in addition to the autophagy activator.
  • the other autophagy activating components include at least one vitamin derivative or a salt thereof selected from the group consisting of vitamin C derivatives, vitamin E derivatives, and vitamin P derivatives.
  • the composition for activating autophagy of the present embodiment contains at least one vitamin derivative or a salt thereof selected from the group consisting of vitamin C derivatives, vitamin E derivatives, and vitamin P derivatives
  • the total content of the vitamin derivative or a salt thereof is preferably 0.01 to 15% by mass, more preferably 0.05 to 10% by mass, and still more preferably 0.1 to 5% by mass relative to the total amount of the composition for activating autophagy.
  • composition for activating autophagy of the present embodiment preferably contains a vitamin C derivative or a salt thereof in addition to the autophagy activator.
  • a vitamin C derivative or a salt thereof By containing a vitamin C derivative or a salt thereof, the activation action of autophagy is further improved.
  • vitamin C derivatives include ascorbic acid derivatives obtained by derivatizing at least one hydroxyl group of ascorbic acid.
  • examples of the ascorbic acid derivative include ascorbyl phosphate obtained by phosphorylating any of the hydroxyl groups of ascorbic acid (also referred to as ascorbic acid phosphate); fatty acid esters of ascorbyl phosphate obtained by phosphorylating any of the hydroxyl groups of ascorbic acid, and esterifying the other hydroxyl groups with fatty acids; ethyl ascorbic acid obtained by ethoxylating any of the hydroxyl groups of ascorbic acid; ascorbic acid glucoside obtained by glucosidating any of the hydroxyl groups of ascorbic acid; acylated ascorbic acid obtained by acylating any of the hydroxyl groups of ascorbic acid; acylated ascorbyl phosphate obtained by acylating any of the hydroxyl groups of ascorbic acid and phosphorylating the other hydroxyl groups; glyceryl ascorbic acid obtained by substituting any of hydroxyl groups of ascorbic acid with glycer
  • salts of ascorbic acid derivatives include salts of ascorbic acid derivatives and inorganic bases, and salts of ascorbic acid derivatives and organic bases.
  • salts with inorganic bases include alkali metal salts such as sodium salts and potassium salts; alkaline earth metal salts such as calcium salts and magnesium salts; aluminum salts; ammonium salts; and zinc salts.
  • salts with organic bases include alkylaluminium salts and salts with basic amino acids.
  • ascorbic acid derivatives or salts thereof (i) ascorbyl phosphate or salts thereof, (ii) fatty acid esters of ascorbyl phosphate or salts thereof, (iii) ethyl ascorbic acid or salts thereof, and (iv) ascorbic acid glucoside or salts thereof are preferable, and (i) ascorbyl phosphate or salts thereof and (ii) fatty acid esters of ascorbyl phosphate or salts thereof are more preferable.
  • Ascorbyl phosphate is a compound in which a phosphate group is introduced to at least one hydroxyl group of ascorbic acid.
  • Suitable examples of ascorbyl phosphate include a compound represented by the following chemical Formula (1).
  • the compound represented by the following chemical Formula (1) is ascorbic acid-2-phosphate obtained by protecting the hydroxyl group at the second position of ascorbic acid with phosphate.
  • Ascorbyl phosphate exists as D- and L-stereoisomers, as well as the racemic DL-form. Ascorbyl phosphate in the present embodiment may be any of these stereoisomers, but from the viewpoint of easy availability, the L-form is preferable, and specifically, L-ascorbic acid-2-phosphate esters are preferable.
  • salts of ascorbyl phosphate include salts of ascorbyl phosphate and inorganic bases, and salts of ascorbyl phosphate and organic bases.
  • salts with inorganic bases include alkali metal salts such as sodium salts and potassium salts; alkaline earth metal salts such as calcium salts and magnesium salts; aluminum salts; ammonium salts; and zinc salts.
  • salts with organic bases include alkylammonium salts and salts with basic amino acids.
  • alkali metal salts or alkaline earth metal salts are preferable, sodium salts or magnesium salts are more preferable, and magnesium salts are still more preferable.
  • a magnesium salt of ascorbyl phosphate is preferable from the viewpoint of high stability and resistance to coloration.
  • a salt of ascorbyl phosphate is preferable, an alkali metal salt of the compound represented by the above chemical Formula (1) or an alkaline earth metal salt of the compound represented by (1) is more preferable, and a sodium salt of the compound represented by the chemical Formula (1) or a magnesium salt of the compound represented by the chemical Formula (1) is still more preferable.
  • the magnesium salt of the compound represented by the above chemical Formula (1) the magnesium salt of L-ascorbic acid-2-phosphate is particularly preferable.
  • the sodium salt of the compound represented by the above chemical Formula (1) the sodium salt of L-ascorbic acid-2-phosphate is particularly preferable.
  • ascorbyl phosphate or salts thereof may be used alone or in combination of two or more.
  • composition for activating autophagy of the present embodiment contains ascorbyl phosphate or a salt thereof, the content thereof is preferably 0.1 to 15% by mass, more preferably 0.5 to 10% by mass, and still more preferably 1 to 5% by mass relative to the total amount of the composition for activating autophagy.
  • Ascorbyl phosphate or salts thereof can be produced by known production methods such as those described in Japanese Unexamined Patent Publication No. 2-279690 and
  • ascorbyl phosphate can be obtained by reacting ascorbic acid with phosphorus oxychloride or the like for phosphorylation.
  • a salt of ascorbyl phosphate can be obtained by neutralizing the ascorbyl phosphate solution with a metal oxide such as magnesium oxide or a metal hydroxide such as sodium hydroxide.
  • Examples of commercially available ascorbyl phosphate salts include ascorbic acid PS (compound name: sodium salt of L-ascorbic acid-2-phosphate ester (also referred to as sodium L-ascorbyl-2-phosphate), display name Sodium Ascorbyl Phosphate) manufactured by Showa Denko K.K., and ascorbic acid PM (compound name: magnesium salt of L-ascorbic acid-2-phosphate ester (also referred to as magnesium L-ascorbyl-2-phosphate), display name; Magnesium Ascorbyl Phosphate) manufactured by Showa Denko K.K.
  • the fatty acid ester of ascorbyl phosphate is a compound in which a fatty acid is ester-bound to at least one hydroxyl group of ascorbyl phosphate.
  • a linear or branched fatty acid having 6 to 22 carbon atoms that is, a fatty acid having a linear or branched alkyl group bound to the carboxy group having 5 to 21 carbon atoms
  • a linear or branched fatty acid having 10 to 20 carbon atoms is more preferable
  • a linear or branched fatty acid having 12 to 18 carbon atoms is still more preferable.
  • Examples of fatty acid esters of ascorbyl phosphate include a compound represented by the following general Formula (2).
  • the compound represented by the following general Formula (2) is an ascorbic acid-2-phosphoric acid-6-fatty acid in which phosphoric acid is ester-bound to the hydroxyl group at the second position of ascorbic acid and fatty acid is ester-bound to the hydroxyl group at the sixth position.
  • Rc 1 is a linear or branched alkyl group having 5 to 21 carbon atoms
  • Rd is a linear or branched alkyl group having 5 to 21 carbon atoms.
  • examples thereof include a linear or branched pentyl group, a linear or branched hexyl group, a linear or branched heptyl group, a linear or branched octyl group, a linear or branched nonyl group, a linear or branched decyl group, a linear or branched undecyl group, a linear or branched dodecyl group, a linear or branched tridecyl group, a linear or branched tetradecyl group, a linear or branched pentadecyl group, a linear or branched hexadecyl group, a linear or branched heptadecyl group, a linear or branched octadecyl group, a linear or branched nonadecyl group
  • Rc 1 is preferably a linear or branched alkyl group having 9 to 19 carbon atoms, more preferably a linear or branched alkyl group having 11 to 17 carbon atoms, still more preferably a linear or branched alkyl group having 13 to 15 carbon atoms, and from the viewpoint of availability of raw materials, particularly preferably a linear alkyl group having 15 carbon atoms (linear pentadecyl group).
  • 6-O-palmitoyl ascorbic acid-2-phosphate (also referred to ascorbic acid-2-phosphate-6-palmitic acid) is particularly preferable as the compound represented by the general Formula (2).
  • the fatty acid esters of ascorbyl phosphate exist as D- and L-stereoisomers, as well as the racemic DL-form.
  • the fatty acid ester of ascorbyl phosphate in the present embodiment may be any of these stereoisomers, but from the viewpoint of easy availability, the L-form is preferable, and specifically, the fatty acid esters of L-ascorbic acid-2-phosphate ester are preferable.
  • salts of fatty acid esters of ascorbyl phosphate include salts of fatty acid esters of ascorbyl phosphate and inorganic bases, and salts of fatty acid esters of ascorbyl phosphate and organic bases.
  • salts with inorganic bases include alkali metal salts such as sodium salts and potassium salts; alkaline earth metal salts such as calcium salts and magnesium salts; aluminum salts; ammonium salts; and zinc salts.
  • salts with organic bases include alkylammonium salts and salts with basic amino acids.
  • alkali metal salts or alkaline earth metal salts are preferable, sodium salts or magnesium salts are more preferable, and sodium salts are still more preferable.
  • Sodium salts of fatty acid esters of ascorbyl phosphate are preferable from the viewpoint of stability and ease of incorporation into formulations.
  • a salt of fatty acid ester of ascorbyl phosphate is preferable, an alkali metal salt of the compound represented by the above general Formula (2) or an alkaline earth metal salt of the compound represented by the above general Formula (2) is more preferable, a sodium salt of the compound represented by the general Formula (2) or a magnesium salt of the compound represented by the general Formula (2) is still more preferable, and a sodium salt of the compound represented by the general Formula (2), specifically a sodium salt of L-ascorbic acid-2-phosphoric acid-6-palmitic acid is particularly preferable.
  • fatty acid esters of ascorbyl phosphate or salts thereof may be used alone or in combination of two or more.
  • composition for activating autophagy of the present embodiment contains a fatty acid ester of ascorbyl phosphate or a salt thereof, the content thereof is preferably 0.05 to 12% by mass, more preferably 0.05 to 5% by mass, and still more preferably 0.1 to 2% by mass.
  • Fatty acid esters of ascorbyl phosphate or salts thereof can be produced by known production methods such as those described in Japanese Patent No. 62-65550.
  • a fatty acid ester of ascorbyl phosphate can be obtained by condensation reaction of the ascorbyl phosphate and a fatty acid or an ester thereof after ascorbyl phosphate is produced in the same manner as the method for producing ascorbyl phosphate described above.
  • a salt of a fatty acid ester of ascorbyl phosphate can be obtained by neutralizing the fatty acid ester solution of ascorbyl phosphate with a metal oxide such as magnesium oxide or a metal hydroxide such as sodium hydroxide.
  • Examples of commercially available salts of fatty acid esters of ascorbyl phosphate in the composition for activating autophagy of the present embodiment include APPRECIER (registered trademark) (APPS) (compound name: sodium salt of L-ascorbic acid-2-phosphoric acid-6-palmitic acid (also referred to as sodium salt of L-6-O-palmitoyl ascorbic acid-2-phosphoric acid), display name: Trisodium Ascorbyl Palmitate Phosphate) manufactured by Showa Denko K.K.
  • APPRECIER registered trademark
  • APPS compound name: sodium salt of L-ascorbic acid-2-phosphoric acid-6-palmitic acid (also referred to as sodium salt of L-6-O-palmitoyl ascorbic acid-2-phosphoric acid)
  • display name Trisodium Ascorbyl Palmitate Phosphate
  • Ethyl ascorbic acid is a compound in which an ethyl group is introduced to at least one hydroxyl group of ascorbic acid.
  • ethyl ascorbic acid examples include a compound represented by the following chemical Formula (3).
  • the compound represented by the following chemical Formula (3) is 3-O-ethyl ascorbic acid in which the hydrogen atom of the hydroxyl group at the third position of ascorbic acid is substituted with an ethyl group.
  • Ethyl ascorbic acid exists as D- and L-stereoisomers, as well as the racemic DL-form.
  • Ethyl ascorbic acid may be any of these stereoisomers, but from the viewpoint of easy availability, the L-form is preferable, and specifically, L-3-O-ethyl ascorbic acid (3-O-ethyl-L-ascorbic acid) is preferable.
  • Salts of ethyl ascorbic acid examples include salts of ethyl ascorbic acid and inorganic bases, and salts of ethyl ascorbic acid and organic bases.
  • salts with inorganic bases include alkali metal salts such as sodium salts and potassium salts; alkaline earth metal salts such as calcium salts and magnesium salts; aluminum salts; ammonium salts; and zinc salts.
  • salts with organic bases include alkylammonium salts and salts with basic amino acids.
  • ethyl ascorbic acid or salts thereof from the viewpoint of easy availability, ethyl ascorbic acid is preferable, and L-3-O-ethyl ascorbic acid is more preferable.
  • ethyl ascorbic acid or salts thereof may be used alone or in combination of two or more.
  • composition for activating autophagy of the present embodiment contains ethyl ascorbic acid or a salt thereof, the content thereof is preferably 0.01 to 15% by mass, more preferably 0.1 to 10% by mass, and still more preferably 0.5 to 5% by mass relative to the total amount of the composition for activating autophagy.
  • Ethyl ascorbic acid or salts thereof can be produced by a known production method.
  • ethyl ascorbic acid can be produced by a method of alkylating ascorbic acid with an alkyl halide in the presence of sodium methoxide in dimethyl sulfoxide (DMSO); methods described in Japanese Unexamined Patent Publication No. 8-134055 and Japanese Unexamined Patent Publication No. 1-228977, and the like.
  • DMSO dimethyl sulfoxide
  • a salt of ethyl ascorbic acid can be obtained by neutralizing the ethyl ascorbic acid solution with a metal oxide such as magnesium oxide or a metal hydroxide such as sodium hydroxide.
  • ethyl ascorbic acid examples include 3-O-ethyl-L-ascorbic acid (display name: 3-O-ethyl Ascorbic Acid) manufactured by Fujifilm Wako Pure Chemical Industries, Ltd., and the like.
  • Ascorbic acid glucoside is a compound in which at least one hydroxyl group of ascorbic acid is glucosidated.
  • the glucosidic bond is preferably an ⁇ -glucosidic bond.
  • Suitable examples of ascorbic acid glucoside include a compound represented by the following chemical Formula (4).
  • the compound represented by the following chemical Formula (4) is ascorbic acid 2-glucoside in which glucose is bound to the hydroxyl group at the second position of ascorbic acid.
  • Ascorbic acid exists as D- and L-stereoisomers, as well as the racemic DL-form.
  • Ascorbic acid in ascorbic acid glucoside may be any of these stereoisomers, but from the viewpoint of easy availability, the L-form is preferable, and as ascorbic acid glucoside, L-ascorbic acid-2-glucoside is specifically preferable.
  • Glucose in ascorbic acid glucoside may be in the D-form or the L-form, but the D-form is preferable from the viewpoint of availability.
  • salts of ascorbic acid glucoside include salts of ascorbic acid glucoside and inorganic bases, and salts of ascorbic acid glucoside and organic bases.
  • salts with inorganic bases include alkali metal salts such as sodium salts and potassium salts; alkaline earth metal salts such as calcium salts and magnesium salts; aluminum salts; ammonium salts; and zinc salts.
  • salts with organic bases include alkylaluminium salts and salts with basic amino acids.
  • ascorbic acid glucoside or salts thereof from the viewpoint of easy availability, ascorbic acid glucoside is preferable, and L-ascorbic acid 2-glucoside is more preferable.
  • ascorbic acid glucoside or salts thereof may be used alone or in combination of two or more.
  • composition for activating autophagy of the present embodiment contains ascorbic acid glucoside or a salt thereof, the content thereof is preferably 0.01 to 15% by mass, more preferably 0.1 to 10% by mass, and still more preferably 0.5 to 5% by mass relative to the total amount of the composition for activating autophagy.
  • Ascorbic acid glucoside or salts thereof can be produced, for example, by the method described in Japanese Unexamined Patent Publication No. 03-139288.
  • ascorbic acid glucoside can be produced by ⁇ -glucosidic bonding of one molecule of glucose to the hydroxyl group at the second position of ascorbic acid by an enzymatic reaction.
  • a salt of ascorbic acid glucoside can be obtained by neutralizing the ascorbic acid glucoside solution with a metal oxide such as magnesium oxide or a metal hydroxide such as sodium hydroxide.
  • ascorbic acid glucoside examples include ascorbic acid 2-glucoside (compound name: L-ascorbic acid 2-glucoside, display name: Ascorbyl Glucoside) manufactured by Hayashibara Co., Ltd., and the like.
  • ascorbic acid derivatives or salts thereof may be used alone or in combination of two or more.
  • ascorbic acid derivatives or salts thereof contained in the composition for activating autophagy of the present embodiment among the above, from the viewpoint of further activating autophagy, (i) ascorbyl phosphate or salts thereof or (ii) fatty acid esters of ascorbyl phosphate or salts thereof are preferable, and (ii) fatty acid esters of ascorbyl phosphate or salts thereof are more preferable.
  • composition for activating autophagy of the present embodiment can further promote the expression of the LC3 gene, ATG5 gene, and Beclin 1 gene by containing an ascorbic acid derivative or a salt thereof in addition to the inositol derivative in which a saccharide is bound to inositol.
  • composition for activating autophagy of the present embodiment can further suppress the expression of mTOR gene by containing an ascorbic acid derivative or a salt thereof in addition to the inositol derivative in which a saccharide is bound to inositol.
  • composition for activating autophagy of the present embodiment can further promote the expression of the LC3 gene, ATG5 gene, and Beclin 1 gene in the presence of amyloid ⁇ , especially in nerve cells, by containing an ascorbic acid derivative or a salt thereof in addition to the inositol derivative in which a saccharide is bound to inositol.
  • composition for activating autophagy of the present embodiment can further suppress apoptosis in the presence of amyloid ⁇ , especially in nerve cells, by containing an ascorbic acid derivative or a salt thereof in addition to the inositol derivative in which a saccharide is bound to inositol.
  • composition for activating autophagy of the present embodiment preferably contains a vitamin E derivative or a salt thereof in addition to the autophagy activator.
  • a vitamin E derivative or a salt thereof By containing a vitamin E derivative or a salt thereof, the activation action of autophagy is further improved.
  • vitamin E derivatives examples include tocopherol phosphates or salts thereof.
  • tocopherol phosphate examples include compounds represented by the following general Formula (5).
  • Rd 1 , Rd 2 , and Rd 3 each independently represent a hydrogen atom or a methyl group.
  • the tocopherol phosphate is not particularly limited and may be any of these tocopherol phosphates. Among these, ⁇ -tocopherol phosphate and ⁇ -tocopherol phosphate are preferable, and ⁇ -tocopherol phosphate is more preferable.
  • the compound represented by the above general Formula (5) has an asymmetric carbon atom at the second position of the chroman ring, d- and l-stereoisomers and dl-stereoisomers are present.
  • the tocopherol phosphate may be any of these stereoisomers, but the dl-form is preferable.
  • tocopherol phosphate dl- ⁇ -tocopherol phosphate and dl- ⁇ -tocopherol phosphate are preferable, and dl- ⁇ -tocopherol phosphate is more preferable.
  • the salt of tocopherol phosphate is not particularly limited, but examples thereof include salts with inorganic bases and salts with organic bases.
  • salts with inorganic bases include alkali metal salts such as sodium salts and potassium salts; alkaline earth metal salts such as calcium salts and magnesium salts; aluminum salts; ammonium salts; and zinc salts.
  • salts with organic bases include alkylaluminium salts and salts with basic amino acids.
  • alkali metal salt As the salt of tocopherol phosphate, an alkali metal salt is preferable, and a sodium salt is more preferable.
  • Alkali metal salts of tocopherol phosphates, particularly sodium salts have the advantage of being highly soluble in water and easy to handle because alkali metal salts are powdery.
  • Preferable aspects of the tocopherol phosphate include an alkali metal salt (for example, sodium salt) of the compound represented by the general Formula (5), an alkali metal salt (for example, sodium salt) of ⁇ -tocopherol phosphate, an alkali metal salt (for example, sodium salt) of ⁇ -tocopherol phosphate, an alkali metal salt (for example, sodium salt) of dl- ⁇ -tocopherol phosphate, and an alkali metal salt (for example, sodium salt) of dl- ⁇ -tocopherol phosphate.
  • an alkali metal salt for example, sodium salt of the compound represented by the general Formula (5)
  • an alkali metal salt for example, sodium salt of ⁇ -tocopherol phosphate
  • an alkali metal salt for example, sodium salt of ⁇ -tocopherol phosphate
  • an alkali metal salt for example, sodium salt of dl- ⁇ -tocopherol phosphate
  • an alkali metal salt for example,
  • the alkali metal salts of tocopherol phosphate the sodium salt of ⁇ -tocopherol phosphate and the sodium salt of ⁇ -tocopherol phosphate are preferable, and the sodium salt of ⁇ -tocopherol phosphate is more preferable.
  • the sodium salt of dl- ⁇ -tocopherol phosphate is commercially available from Showa Denko K.K. under the product name of TPNa (registered trademark) (display name: Sodium Tocopheryl Phosphate).
  • TPNa registered trademark
  • the TPNa is exemplified as a preferable example of the tocopherol phosphate.
  • the tocopherol phosphates or salts thereof may be used alone or in combination of two or more.
  • composition for activating autophagy of the present embodiment contains tocopherol phosphate or a salt thereof, the content thereof is preferably 0.01 to 10% by mass, more preferably 0.05 to 5% by mass, and still more preferably 0.1 to 3% by mass relative to the total amount of the composition for activating autophagy.
  • a tocopherol phosphate or a salt thereof can be produced by known production methods such as those described in Japanese Unexamined Patent Publication No. 59-44375 and International Publication No. 97/14705.
  • a tocopherol phosphate can be obtained by allowing a phosphorylating agent such as phosphorus oxychloride to act on tocopherol dissolved in a solvent, followed by appropriate purification after completion of the reaction.
  • a salt of tocopherol phosphate can be obtained by neutralizing the obtained tocopherol phosphate with a metal oxide such as magnesium oxide, a metal hydroxide such as sodium hydroxide, or ammonium hydroxide or alkylammonium hydroxide.
  • composition for activating autophagy of the present embodiment can further promote the expression of the LC3 gene, ATG5 gene, and Beclin 1 gene by containing a tocopherol phosphate or a salt thereof in addition to the inositol derivative in which a saccharide is bound to inositol.
  • composition for activating autophagy of the present embodiment can further suppress the expression of mTOR gene by containing a tocopherol phosphate or a salt thereof in addition to the inositol derivative in which a saccharide is bound to inositol.
  • composition for activating autophagy of the present embodiment can further promote the expression of the LC3 gene, ATG5 gene, and Beclin 1 gene in the presence of amyloid ⁇ , especially in nerve cells, by containing a tocopherol phosphate or a salt thereof in addition to the inositol derivative in which a saccharide is bound to inositol.
  • composition for activating autophagy of the present embodiment can further suppress apoptosis in the presence of amyloid ⁇ , especially in nerve cells, by containing a tocopherol phosphate or a salt thereof in addition to the inositol derivative in which a saccharide is bound to inositol.
  • composition for activating autophagy of the present embodiment preferably contains a vitamin P derivative or a salt thereof in addition to the autophagy activator.
  • a vitamin P derivative or a salt thereof By containing a vitamin P derivative or a salt thereof, the activation action of autophagy is further improved.
  • vitamin P derivatives examples include methyl hesperidin obtained by methylating hesperidin.
  • the methyl hesperidin is preferably solubilized in water.
  • methyl hesperidin mainly is a chalcone type compound (chalcone methyl hesperidin) represented by the following general Formula (6) and a flavanone type compound (flavanone methyl hesperidin) represented by the following general Formula (7).
  • R 1 to R 9 are each independently a methyl group or a hydrogen atom, provided that at least one of R 1 to R 9 is a methyl group.
  • R 1 to R 18 are each independently a methyl group or a hydrogen atom, provided that at least one of R 1 to R 18 is a methyl group.
  • the methyl hesperidin used in the composition for activating autophagy of the present embodiment is one or more selected from a group consisting of chalcone methyl hesperidin represented by the general Formula (6) and flavanone methyl hesperidin represented by the general Formula (7).
  • R 1 to R 9 are each independently a methyl group or a hydrogen atom, and at least one of R 1 to R 9 is a methyl group.
  • R 1 to R 9 preferably, any one to six are methyl groups, and more preferably, any two to five are methyl groups.
  • R 11 to R 18 are each independently a methyl group or a hydrogen atom, and at least one of R 11 to R 18 is a methyl group.
  • R 11 to R 18 preferably, any one to four are methyl groups, and more preferably, any one to three are methyl groups.
  • a compound represented by the following general Formula (8) is preferable as the chalcone methyl hesperidin.
  • a compound represented by the following general Formula (9) is preferable as the flavanone methyl hesperidin.
  • R 20 to R 23 are each independently a methyl group or a hydrogen atom.
  • R 24 and R 25 are each independently a methyl group or a hydrogen atom.
  • R 20 to R 23 are each independently a methyl group or a hydrogen atom.
  • the chalcone methyl hesperidin represented by the general Formula (8) is preferably one or more selected from the group consisting of chalcone-1 to chalcone-3 having combinations of R 20 to R 23 shown in Table 1 below.
  • R 24 to R 25 are each independently a methyl group or a hydrogen atom.
  • the flavanone methyl hesperidin represented by the general Formula (9) is preferably one or more selected from the group consisting of flavanone-1 to flavanone-4 having combinations of R 24 and R 25 shown in Table 2 below.
  • Methyl hesperidin may include both a chalcone methyl hesperidin represented by the general Formula (6) or a chalcone methyl hesperidin represented by the general Formula (8), and a flavanone methyl hesperidin represented by the general Formula (7) or a flavanone methyl hesperidin represented by the general Formula (9), or may contain only one of them.
  • the methyl hesperidin may include the chalcone methyl hesperidin represented by the general Formula (8) and the flavanone methyl hesperidin represented by the general Formula (9).
  • the methyl hesperidin may include any one or more of the above-mentioned chalcone-1 to chalcone-3, and may include any one or more of the above-mentioned flavanone-1 to flavanone-4.
  • composition for activating autophagy of the present embodiment may include a mixture of chalcone-1 to chalcone-3 and flavanone-1 to flavanone-3 as methyl hesperidin.
  • Methyl hesperidin can be produced by a known method. Methyl hesperidin can be produced by dissolving hesperidin produced from citrus peel in an aqueous sodium hydroxide solution, allowing the alkali solution to act with a corresponding amount of dimethylsulfuric acid, neutralizing the reaction solution with sulfuric acid, extracting with n-butyl alcohol, distilling off the solvent, and recrystallizing with isopropyl alcohol (Sakieki, Nippon Kagaku Zassi, (1958) Vol. 79, pp. 733-736; Japanese Patent No. 6312333).
  • the method for producing methyl hesperidin is not limited to the above method.
  • Methyl hesperidin can also be used by purchasing a commercial product (for example, those distributed as pharmaceutical additives, food additives, and cosmetic ingredients, or “Methyl Hesperidin” (Showa Denko K.K.), “Methyl Hesperidin” (Tokyo Chemical Industry Co., Ltd.), “Hesperidin Methyl Chalcone” (Sigma-Aldrich) or the like).
  • a commercial product for example, those distributed as pharmaceutical additives, food additives, and cosmetic ingredients, or “Methyl Hesperidin” (Showa Denko K.K.), “Methyl Hesperidin” (Tokyo Chemical Industry Co., Ltd.), “Hesperidin Methyl Chalcone” (Sigma-Aldrich) or the like).
  • the content thereof is preferably 0.01 to 5% by mass, more preferably 0.01 to 2% by mass, and still more preferably 0.05 to 1% by mass relative to the total amount of the composition for activating autophagy.
  • composition for activating autophagy of the present embodiment can further promote the expression of the LC3 gene, ATG5 gene, and Beclin 1 gene by containing methyl hesperidin or a salt thereof in addition to the inositol derivative in which a saccharide is bound to inositol.
  • composition for activating autophagy of the present embodiment can further suppress the expression of mTOR gene by containing methyl hesperidin or a salt thereof in addition to the inositol derivative in which a saccharide is bound to inositol.
  • composition for activating autophagy of the present embodiment can further promote the expression of the LC3 gene, ATG5 gene, and Beclin 1 gene in the presence of amyloid ⁇ , especially in nerve cells, by containing methyl hesperidin or a salt thereof in addition to the inositol derivative in which a saccharide is bound to inositol.
  • composition for activating autophagy of the present embodiment can further suppress apoptosis in the presence of amyloid ⁇ , especially in nerve cells, by containing methyl hesperidin or a salt thereof in addition to the inositol derivative in which a saccharide is bound to inositol.
  • composition for activating autophagy of the present embodiment may be a pharmaceutical composition or a cosmetic.
  • the present invention provides a pharmaceutical composition for activating autophagy, containing the autophagy activator described above and a pharmaceutically acceptable carrier.
  • the pharmaceutically acceptable carrier is not particularly limited, and in addition to those listed above, carriers generally used for pharmaceuticals can be used.
  • carriers generally used for pharmaceuticals can be used.
  • general raw materials described in Japanese Pharmacopoeia, Japanese Non-Pharmacopoeia Pharmaceutical Standards, Pharmaceutical Excipients Standards 2013 (Yakuji Nippo, 2013), Pharmaceutical Excipients Dictionary 2016 (Edited by Japan Pharmaceutical Excipients Association, Yakuji Nippo, 2016), Handbook of Pharmaceutical Excipients, 7th edition (Pharmaceutical Press, 2012), and the like can be used.
  • the pharmaceutically acceptable carriers may be used alone, or in combination of two or more.
  • the pharmaceutical composition of the present embodiment may contain other components in addition to the autophagy activator and pharmaceutically acceptable carrier.
  • Other components are not particularly limited, and general pharmaceutical additives can be used.
  • active components other than the autophagy activators described above can also be used as other components.
  • pharmaceutical additives and active components as other components in addition to the examples above, general raw materials described in Japanese Pharmacopoeia, Japanese Non-Pharmacopoeia Pharmaceutical Standards, Pharmaceutical Excipients Standards 2013 (Yakuji Nippo, 2013), Pharmaceutical Excipients Dictionary 2016 (Edited by Japan Pharmaceutical Excipients Association, Yakuji Nippo, 2016), Handbook of Pharmaceutical Excipients, 7th edition (Pharmaceutical Press, 2012), and the like can be used.
  • the other ingredients may be used alone, or in combination of two or more.
  • the dosage form of the pharmaceutical composition of the present embodiment is not particularly limited, and may be a dosage form generally used as a pharmaceutical formulation.
  • examples thereof include orally administered dosage forms such as tablets, coated tablets, pills, powders, granules, capsules, liquids, suspensions, and emulsions; and dosage forms for parenteral administration such as injections, suppositories, and external skin preparations.
  • Pharmaceutical compositions in these dosage forms can be formulated according to standard methods (for example, methods described in the Japanese Pharmacopoeia).
  • the administration method of the pharmaceutical composition of the present embodiment is not particularly limited, and administration can be performed by a method generally used as a pharmaceutical administration method.
  • the pharmaceutical composition may be administered orally as tablets, coated tablets, pills, powders, granules, capsules, liquids, suspensions, and emulsions, may be administered alone as an injection or an infusion preparation or mixed with a general infusion such as glucose solution and Ringer's solution, intravenously, intraarterially, intramuscularly, intradermally, subcutaneously, and intraperitoneally, may be administered rectally as a suppository, and may be administered to the skin as an external skin preparation.
  • a general infusion such as glucose solution and Ringer's solution
  • intravenously, intraarterially, intramuscularly, intradermally, subcutaneously, and intraperitoneally may be administered rectally as a suppository, and may be administered to the skin as an external skin preparation.
  • the administration dosage of the pharmaceutical composition of the present embodiment can be a therapeutically effective amount.
  • a therapeutically effective amount may be appropriately determined depending on the symptoms, body weight, age, sex, and the like of the patient, dosage form of the pharmaceutical composition, administration method, and the like.
  • the administration dosage of the pharmaceutical composition of the present embodiment is 0.01 to 500 mg per dosage unit form as the total content of inositol derivatives in which a saccharide is bound to inositol in the case of oral administration, 0.02 to 250 mg per dosage unit form as the total content of inositol derivatives in which a saccharide is bound to inositol in the case of injection, 0.01 to 500 mg per dosage unit form as the total content of inositol derivatives in which a saccharide is bound to inositol in the case of suppositories, and 0.01 to 500 mg per dosage unit form as the total content of inositol derivatives in which a saccharide is bound to inositol in the case of external skin preparations.
  • the administration interval of the pharmaceutical composition of the present embodiment may be appropriately determined according to the symptoms, body weight, age, sex, and the like of the patient, dosage form of the pharmaceutical composition, administration method, and the like. For example, administration can be done once a day or approximately 2 to 3 times a day.
  • the pharmaceutical composition of the present embodiment can be used for treating or preventing diseases caused by decreased autophagy activity.
  • diseases include neurodegenerative diseases such as Alzheimer's disease, Huntington's disease, Parkinson's disease, and SENDA disease; inflammatory bowel diseases such as Crohn's disease; and cancer.
  • the pharmaceutical composition of the present embodiment can be administered to patients with, for example, neurodegenerative diseases such as Alzheimer's disease, Huntington's disease, Parkinson's disease, and SENDA disease; inflammatory bowel diseases such as Crohn's disease; and cancer, and used to suppress progression of neurodegenerative diseases, inflammatory bowel diseases, or cancer.
  • the pharmaceutical composition of the present embodiment can be administered to patients with neurodegenerative diseases such as Alzheimer's disease, Huntington's disease, Parkinson's disease, and SENDA disease; inflammatory bowel diseases such as Crohn's disease; and cancer, and used to treat neurodegenerative diseases, inflammatory bowel diseases, or cancer.
  • the pharmaceutical composition of the present embodiment can be used to treat diseases caused by amyloid ⁇ .
  • the pharmaceutical composition of the present embodiment can be used to treat diseases caused by the decreased expression level of LC3 gene, ATG5 gene, or Beclin 1 gene.
  • the pharmaceutical composition of the present embodiment can be used to treat diseases caused by the increased expression level of mTOR.
  • the pharmaceutical composition of the present embodiment can be suitably used for treating Alzheimer's disease.
  • the pharmaceutical composition of the present embodiment can also be administered to patients at high risk of developing neurodegenerative diseases such as Alzheimer's disease, Huntington's disease, Parkinson's disease, SENDA disease, and the like, and used to prevent neurodegenerative diseases.
  • the pharmaceutical composition of the present embodiment can also be administered to patients at high risk of developing inflammatory bowel disease such as Crohn's disease, and used to prevent inflammatory bowel diseases.
  • the pharmaceutical composition of the present embodiment can also be administered to patients at high risk of developing cancer, and used to prevent cancer.
  • the present invention provides a cosmetic for activating autophagy, containing the autophagy activator described above and a pharmaceutically acceptable carrier.
  • the pharmaceutically acceptable carrier is not particularly limited, and in addition to those listed above, carriers commonly used in cosmetics can be used.
  • carriers commonly used in cosmetics can be used.
  • general raw materials described in the second edition commentary on the Standards for Cosmetic Ingredients (edited by Society of Japanese Pharmacopoeia, Yakuji Nippo, 1984), Ingredient Standards for Non-Standard Cosmetic Ingredients (supervised by the Examination Division of the Pharmaceutical Affairs Bureau, Ministry of Health and Welfare, Yakuji Nippo, 1993), Supplement to Standards for Non-Standard Cosmetic Ingredients (supervised by the Pharmaceutical Affairs Bureau, Ministry of Health and Welfare, Yakuji Nippo, 1993), Permit criteria for each cosmetic type (supervised by the Pharmaceutical Affairs Bureau, Ministry of Health and Welfare, Yakuji Nippo, 1993), Dictionary of Cosmetic Ingredients (Nikko Chemicals, Inc., 1991), International Cosmetic Ingredient Dictionary and Handbook 2002 Ninth Edition Vol. 1 to 4, by CTFA, and the like can be used.
  • the pharmaceutically acceptable carriers may be used alone, or in combination of two or more.
  • the cosmetic of the present embodiment may contain other ingredients in addition to the autophagy activator and pharmaceutically acceptable carrier.
  • Other ingredients are not particularly limited, and general cosmetic additives can be used.
  • active components other than the autophagy activators described above can also be used as other components.
  • the form of the cosmetic of the present embodiment is not particularly limited, and may be a form commonly used as a cosmetic.
  • hair cosmetics such as shampoos, rinses, and hair styling agents
  • basic cosmetics such as facial cleansers, cleansing agents, lotions, milky lotions, lotions, creams, gels, sunscreens, packs, masks, and serums
  • makeup cosmetics such as foundations, makeup bases, lipsticks, lip glosses, and blushes
  • body cosmetics such as body cleansers, body powders, and deodorant cosmetics.
  • the dosage form of the cosmetic of the present embodiment is not particularly limited, and examples thereof include emulsion type such as oil-in-water (O/W) type, water-in-oil (W/O) type, W/O/W type, and O/W/O type, emulsified polymer type, oily, solid, liquid, dough, stick, volatile oil, powder, jelly, gel, paste, cream, sheet, film, mist, spray, aerosol, multilayer, foam, and flake.
  • emulsion type such as oil-in-water (O/W) type, water-in-oil (W/O) type, W/O/W type, and O/W/O type
  • emulsified polymer type oily, solid, liquid, dough, stick, volatile oil, powder, jelly, gel, paste, cream, sheet, film, mist, spray, aerosol, multilayer, foam, and flake.
  • the amount of the cosmetics used in the present embodiment is not particularly limited, but can be an amount effective for activating autophagy.
  • the amount of the cosmetics used in the present embodiment is 0.01 to 500 mg, may be, for example, 0.15 to 300 mg, may be, for example, 0.15 to 200 mg, and may be, for example 0.2 to 100 mg per use as the total content of inositol derivatives in which a saccharide is bound to inositol.
  • the use interval of the cosmetic of the present embodiment is not particularly limited, but can be, for example, once a day or approximately 2 to 3 times a day.
  • the cosmetic of the present embodiment can be used to alleviate symptoms caused by decreased autophagy activity.
  • the cosmetic may be used for daily skin care and makeup by test subjects at high risk of developing these symptoms.
  • the present invention provides a method for activating autophagy, including a step of administering the inositol derivative in which a saccharide is bound to inositol to a target.
  • the present invention provides a method for promoting expression of the LC3 gene, ATG5 gene, or Beclin 1 gene, including a step of administering the inositol derivative in which a saccharide is bound to inositol to a target.
  • the present invention provides a method for suppressing mTOR gene expression, including a step of administering the inositol derivative in which a saccharide is bound to inositol to a target.
  • the present invention provides a method for suppressing apoptosis in the presence of amyloid ⁇ , including a step of administering the inositol derivative in which a saccharide is bound to inositol to a target.
  • the present invention provides an inositol derivative in which a saccharide is bound to inositol for activating autophagy.
  • the present invention provides an inositol derivative in which a saccharide is bound to inositol for promoting expression of the LC3 gene, ATG5 gene, or Beclin 1 gene.
  • the present invention provides an inositol derivative in which a saccharide is bound to inositol for suppressing mTOR gene expression.
  • the present invention provides an inositol derivative in which a saccharide is bound to inositol for suppressing apoptosis in the presence of amyloid ⁇ .
  • the present invention provides an inositol derivative in which a saccharide is bound to inositol for preventing or treating Alzheimer's disease, Huntington's disease, Parkinson's disease, SENDA disease, Crohn's disease, or cancer.
  • the present invention provides the use of an inositol derivative in which a saccharide is bound to inositol for producing an autophagy activator.
  • the present invention provides the use of an inositol derivative in which a saccharide is bound to inositol for producing a promoter of expression of the LC3 gene, ATG5 gene, or Beclin 1 gene.
  • the present invention provides the use of an inositol derivative in which a saccharide is bound to inositol for producing a suppressant of mTOR gene expression.
  • the present invention provides the use of an inositol derivative in which a saccharide is bound to inositol for producing a promoter of expression of the LC3 gene, ATG5 gene, or Beclin 1 gene in the presence of amyloid ⁇ .
  • the present invention provides the use of an inositol derivative in which a saccharide is bound to inositol for producing a suppressant of apoptosis in the presence of amyloid ⁇ .
  • the present invention provides the use of an inositol derivative in which a saccharide is bound to inositol for producing a composition for activating autophagy.
  • the present invention provides the use of an inositol derivative in which a saccharide is bound to inositol for producing a composition for promoting expression of the LC3 gene, ATG5 gene, or Beclin 1 gene.
  • the present invention provides the use of an inositol derivative in which a saccharide is bound to inositol for producing a composition for suppressing mTOR gene expression.
  • the present invention provides the use of an inositol derivative in which a saccharide is bound to inositol for producing a composition for promoting expression of the LC3 gene, ATG5 gene, or Beclin 1 gene in the presence of amyloid ⁇ .
  • the present invention provides the use of an inositol derivative in which a saccharide is bound to inositol for producing a composition for suppressing apoptosis in the presence of amyloid ⁇ .
  • the inositol derivative in which a saccharide is bound to inositol is preferably used in combination with at least one selected from the group consisting of ascorbic acid derivatives or salts thereof, tocopherol phosphates or salts thereof, and methyl hesperidin.
  • myo-inositol manufactured by Tsukino Rice Fine Chemicals Co., Ltd.
  • ⁇ -cyclodextrin manufactured by Ensuiko Sugar Refining Co., Ltd.
  • cyclodextrin glucanotransferase manufactured by Novozymes A/S
  • APM Magnesium salt of L-ascorbic acid-2-phosphate (display name: Magnesium Ascorbyl Phosphate, product name: Ascorbic Acid PM, manufactured by Showa Denko K.K.)
  • APPS sodium salt of L-ascorbic acid-2-phosphate-6-palmitic acid (display name: trisodium ascorbyl palmitate phosphate, product name: APPRECIER (APPS), manufactured by Showa Denko K.K.)
  • ⁇ -TPNa sodium ⁇ -tocopheryl phosphate (product name: TPNa (registered trademark), manufactured by Showa Denko K.K.)
  • ⁇ -TPNa sodium ⁇ -tocopheryl phosphate (manufactured by Showa Denko K.K.)
  • Methyl hesperidin (product name: Methyl Hesperidin) sold by Showa Denko K.K. was used.
  • the total content of the chalcone-1 to chalcone-3 and the flavanone-1 to flavanone-3 is 97.5% by mass or more in the total amount of the composition.
  • Senescent fibroblasts were prepared by the following procedure.
  • Normal human fibroblasts (NB1RGB, RIKEN BRC Cell Bank) were cultured until confluent in D-MEM medium (manufactured by Sigma-Aldrich) to which 10% fetal bovine serum (manufactured by MP Biomedicals) was added. Thereafter, the cells were treated with 250 ⁇ M aqueous hydrogen peroxide for 2 hours, and cultured for 24 hours in D-MEM medium to which fresh 10% fetal bovine serum was added. The treatment with aqueous hydrogen peroxide and the cell culture operation were repeated three times, and the obtained fibroblasts were used as senescent fibroblasts.
  • D-MEM medium manufactured by Sigma-Aldrich
  • 10% fetal bovine serum manufactured by MP Biomedicals
  • the prepared senescent fibroblasts were prepared at a seeding density of 10000 cells/cm 2 and cultured for 24 hours in D-MEM medium (manufactured by Sigma-Aldrich) to which 10% fetal bovine serum (manufactured by MP Biomedicals) was added.
  • D-MEM medium manufactured by Sigma-Aldrich
  • 10% fetal bovine serum manufactured by MP Biomedicals
  • Example 1 the inositol derivative A dissolved in purified water was added to the medium such that the final concentration of the inositol derivative A was 10-4% (V/V).
  • Example 2 the inositol derivative A dissolved in purified water was added to the medium such that the final concentration of the inositol derivative A was 10-3% (V/V).
  • Example 3 the inositol derivative A and APM dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of APM was 100
  • Example 4 the inositol derivative A and APPS dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of APPS was 10 ⁇ M.
  • Example 5 the inositol derivative A and ⁇ -TPNa dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of ⁇ -TPNa was 10 ⁇ M.
  • Example 6 the inositol derivative A and ⁇ -TPNa dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of ⁇ -TPNa was 10 ⁇ M.
  • Example 7 the inositol derivative A and methyl hesperidin dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of methyl hesperidin was 10-2% (V/V).
  • Comparative Example 1 only purified water was added to the medium.
  • inositol hereinafter also referred to as inositol aqueous solution
  • inositol aqueous solution inositol aqueous solution
  • Each medium was then cultured for 24 hours at 37° C. and 5% CO 2 .
  • the normal human fibroblasts were prepared at a seeding density of 10000 cells/cm 2 , and cultured for 24 hours in D-MEM medium (manufactured by Sigma-Aldrich) to which 10% fetal bovine serum (manufactured by MP Biomedicals) was added, and only purified water was added to the medium. The medium was then cultured for 24 hours at 37° C. and 5% CO 2 .
  • D-MEM medium manufactured by Sigma-Aldrich
  • 10% fetal bovine serum manufactured by MP Biomedicals
  • RNA was extracted from senescent fibroblasts or normal human fibroblasts in each example, and cDNA was synthesized from the obtained RNA.
  • cDNA was synthesized from the obtained RNA.
  • primers manufactured by Takara Bio Inc.
  • GAPDH primary manufactured by Takara Bio Inc.
  • the expression level of GAPDH was quantified, and the expression level of each gene was standardized by the value.
  • the relative gene expression level was obtained when the expression level of each gene in Comparative Example 1 was assumed to be 1.00. The results are shown in Table 4.
  • the prepared senescent fibroblasts were prepared at a seeding density of 10000 cells/cm 2 and cultured for 24 hours in D-MEM medium (manufactured by Sigma-Aldrich) to which 10% fetal bovine serum (manufactured by MP Biomedicals) was added.
  • D-MEM medium manufactured by Sigma-Aldrich
  • 10% fetal bovine serum manufactured by MP Biomedicals
  • Example 8 the inositol derivative A dissolved in purified water was added to the medium such that the final concentration of the inositol derivative A was 10-4% (V/V).
  • Example 9 the inositol derivative A dissolved in purified water was added to the medium such that the final concentration of the inositol derivative A was 10-3% (V/V).
  • Example 10 the inositol derivative A and APM dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of APM was 100 ⁇ M.
  • Example 11 the inositol derivative A and APPS dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of APPS was 10 ⁇ M.
  • Example 12 the inositol derivative A and ⁇ -TPNa dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of ⁇ -TPNa was 10 ⁇ M.
  • Example 13 the inositol derivative A and ⁇ -TPNa dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of ⁇ -TPNa was 10 ⁇ M.
  • Example 14 the inositol derivative A and methyl hesperidin dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of methyl hesperidin was 10-2% (V/V).
  • Comparative Example 3 only purified water was added to the medium.
  • inositol hereinafter also referred to as inositol aqueous solution
  • inositol aqueous solution inositol aqueous solution
  • Each medium was then cultured for 24 hours at 37° C. and 5% CO 2 .
  • the normal human fibroblasts were prepared at a seeding density of 10000 cells/cm 2 , and cultured for 24 hours in D-MEM medium (manufactured by Sigma-Aldrich) to which 10% fetal bovine serum (manufactured by MP Biomedicals) was added, and only purified water was added to the medium. The medium was then cultured for 24 hours at 37° C. and 5% CO 2 .
  • RNA was extracted from senescent fibroblasts or normal human fibroblasts in each example, and cDNA was synthesized from the obtained RNA.
  • cDNA was synthesized from the obtained RNA.
  • the expression level of mTOR gene was quantified using primers (manufactured by Takara Bio Inc.) specific to mTOR gene.
  • GAPDH primary manufactured by Takara Bio Inc.
  • the expression level of GAPDH which is a housekeeping gene of which expression does not change with the addition of compounds, was quantified, and the expression level of each gene was standardized by the value.
  • the relative gene expression level was obtained when the expression level of mTOR gene in Comparative Example 3 was assumed to be 1.00. The results are shown in Table 5.
  • the expression level of the mTOR gene in the senescent fibroblasts cultured with the addition of the autophagy activators and vitamin derivatives or salts thereof of Examples 10 to 14, the expression level of the mTOR gene further decreased, and the expression of the mTOR gene further suppressed.
  • the expression levels of the LC3 gene, ATG5 gene, and Beclin 1 gene in human neuroblastoma were measured by the following test method, and the effect of promoting the expression of the LC3 gene, ATG5 gene, and Beclin 1 gene by an autophagy activator was evaluated.
  • Example 17 the inositol derivative A and APM dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of APM was 100 ⁇ M.
  • Example 18 the inositol derivative A and APPS dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of APPS was 10 ⁇ M.
  • Example 19 the inositol derivative A and ⁇ -TPNa dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of ⁇ -TPNa was 10 ⁇ M.
  • Example 20 the inositol derivative A and ⁇ -TPNa dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of ⁇ -TPNa was 10 ⁇ M.
  • Example 21 the inositol derivative A and methyl hesperidin dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of methyl hesperidin was 10-2% (V/V). Moreover, in Comparative Example 5, only purified water was added to the medium. In Comparative Example 6, inositol (hereinafter also referred to as inositol aqueous solution) dissolved in purified water was added to the medium such that the final concentration of inositol (myo-inositol, manufactured by Tokyo Chemical Industry Co., Ltd.) was 10-3% (V/V).
  • an amyloid ⁇ solution was prepared by dissolving amyloid ⁇ (manufactured by Sigma-Aldrich) in a 0.01% (V/V) DMSO aqueous solution, and the amyloid ⁇ solution was added to each medium such that the final concentration of amyloid ⁇ in each medium was 20 ⁇ M.
  • Each medium was then cultured for 48 hours at 37° C. and 5% CO 2 .
  • RNA was extracted from SH-SY5Y cells in each example, and cDNA was synthesized from the obtained RNA.
  • cDNA was synthesized from the obtained RNA.
  • primers manufactured by Takara Bio Inc.
  • GAPDH primary manufactured by Takara Bio Inc.
  • Takara Bio Inc. which is a housekeeping gene of which expression does not change with the addition of compounds.
  • the expression level of each gene was standardized by the value.
  • the relative gene expression level was obtained when the expression level of each gene in Reference Example 3 was assumed to be 1.00. The results are shown in Table 6.
  • the expression levels of the LC3 gene, ATG5 gene, and Beclin 1 gene all increased, and in particular, the expression level of the LC3 gene increased.
  • the SH-SY5Y cells of Examples 15 to 21 exhibited a more remarkable effect of promoting the expression levels of the LC3 gene, the ATG5 gene, and the Beclin 1 gene.
  • the expression levels of the LC3 gene, the ATG5 gene, and the Beclin 1 gene all increased, and in particular, the expression level of the LC3 gene increased.
  • the proportion of apoptotic cells in human neuroblastoma (SH-SY5Y; obtained from ATCC) in the presence of an autophagy activator was measured by the following test method to evaluate the apoptosis suppressing action of the autophagy activator.
  • tests were performed by adding amyloid ⁇ , which is known to induce cell death called apoptosis of nerve cells due to a decrease in autophagy, to each medium.
  • SH-SY5Y cells were prepared at a seeding density of 50000 cells/cm 2 and cultured for 24 hours in D-MEM medium/Ham's F-12 medium (manufactured by Sigma-Aldrich) to which 10% fetal bovine serum (manufactured by MP Biomedicals) was added.
  • D-MEM medium/Ham's F-12 medium manufactured by Sigma-Aldrich
  • 10% fetal bovine serum manufactured by MP Biomedicals
  • Example 22 the inositol derivative A dissolved in purified water was added to the medium such that the final concentration of the inositol derivative A was 10-4% (V/V).
  • Example 23 the inositol derivative A dissolved in purified water was added to the medium such that the final concentration of the inositol derivative A was 10-3% (V/V).
  • Example 24 the inositol derivative A and APM dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of APM was 100 ⁇ M.
  • Example 25 the inositol derivative A and APPS dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of APPS was 10 ⁇ M.
  • Example 26 the inositol derivative A and ⁇ -TPNa dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of ⁇ -TPNa was 10 ⁇ M.
  • Example 27 the inositol derivative A and ⁇ -TPNa dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of ⁇ -TPNa was 10 ⁇ M.
  • Example 28 the inositol derivative A and methyl hesperidin dissolved in purified water were added to the medium such that the final concentration of inositol derivative A was 10-3% (V/V) and the final concentration of methyl hesperidin was 10 ⁇ 2 % (V/V). Moreover, in Comparative Example 7, only purified water was added to the medium. In Comparative Example 8, inositol (hereinafter also referred to as inositol aqueous solution) dissolved in purified water was added to the medium such that the final concentration of inositol (myo-inositol, manufactured by Tokyo Chemical Industry Co., Ltd.) was 10-3% (V/V).
  • an amyloid ⁇ solution was prepared by dissolving amyloid ⁇ (manufactured by Sigma-Aldrich) in a 0.01% (V/V) DMSO aqueous solution, and the amyloid ⁇ solution was added to each medium such that the final concentration of amyloid ⁇ in each medium was 30 ⁇ M.
  • Each medium was then cultured for 48 hours at 37° C. and 5% CO 2 .
  • each SH-SY5Y cell was washed with phosphate buffer (PBS, manufactured by FUJIFILM Wako Pure Chemical Corporation), and with a fluorescence microscope, the number of cells showing strong apoptosis-like Hoechst fluorescence due to chromatin aggregation (Hoechst (+) cells) was counted.
  • PBS phosphate buffer
  • Table 8 shows Prescription Examples 1 to 5 of external preparations as compositions for activating autophagy.
  • an autophagy activator and a composition for activating autophagy containing the autophagy activator capable of effectively activating autophagy are provided.

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